Subject
- Medicine--Early works to 1800102
- Astronomy--Early works to 180080
- Treaties51
- Second World War (1939-1945)45
- Philosophy -- Early works to 180039
- Concessions, Oil, Bahrain37
- Concessions32
- Geometry--Early works to 180031
- Slave trade31
- Boundaries30
- Mathematics -- Early works to 180030
- Astrology--Early works to 180027
- Medicine, Arab27
- Medicine, Medieval26
- Pearl industry and trade26
- Land ownership25
- Smuggling25
- Exports24
- Airfields23
- Bilateral relations22